Xyoo 2021 txhua xyoo, lub koom haum tshawb fawb tooj liab thoob ntiaj teb (ICSG) tau tshaj tawm rau lub Cuaj Hlis 23 tias cov khoom tsim tooj liab thoob ntiaj teb txij lub Ib Hlis mus txog rau Lub Rau Hli tau nce 3.2% txhua xyoo, cov khoom tsim tawm ntawm electrolytic tooj liab (suav nrog electrolysis thiab electrowinning) yog 3.5% siab dua li ntawm tib lub xyoo, thiab cov khoom tsim tawm ntawm cov tooj liab rov ua dua tshiab uas tsim los ntawm cov tooj liab pov tseg yog 1.7% siab dua li ntawm tib lub xyoo. Tuam Tshoj cov khoom tsim tawm tooj liab tau nce 6 feem pua ​​​​​​hauv lub sijhawm Lub Ib Hlis-Lub Rau Hli los ntawm ib xyoos dhau los, raws li cov lej ua ntej. Chile cov khoom tsim tawm tooj liab tau qis dua 7% piv rau lub sijhawm tib lub xyoo dhau los, nrog rau electrolytic refining tooj liab nce 0.5%, tab sis electrorefining tooj liab poob qis 11%. Hauv Africa, kev tsim tawm tooj liab tau nce 13.5 feem pua ​​​​​​xyoo-rau-xyoo raws li cov chaw tsim khoom tooj liab tshiab qhib lossis cov nroj tsuag hydrometallurgical nthuav dav. Kev tsim cov tooj liab ua kom huv hauv Zambia tau nce 12 feem pua ​​​​​​thaum cov chaw ua hlau tau rov zoo los ntawm kev kaw kev tsim khoom thiab teeb meem ua haujlwm hauv xyoo 2019 thiab thaum ntxov xyoo 2020. Kev tsim cov tooj liab ua kom huv hauv Tebchaws Meskas tau nce 14 feem pua ​​​​​​txhua xyoo thaum cov chaw ua hlau tau rov zoo los ntawm teeb meem ua haujlwm hauv xyoo 2020. Cov ntaub ntawv pib qhia tau tias kev tsim khoom poob qis hauv Brazil, Lub Tebchaws Yelemees, Nyiv, Russia, Spain (SX-EW) thiab Sweden vim ntau yam laj thawj, suav nrog kev kaw rau kev saib xyuas, teeb meem ua haujlwm thiab kev kaw cov nroj tsuag SX-EW.